The sex frequently neglected by birders and scientists takes the spotlight in the Audubon Photography Awards’ Female Bird Prize Carlyn Kranking - Associate Web Editor, Science A female American ...

Male cardinals are red. Female cardinals are tan. The odd bird that's been roosting outside John and Shirley Caldwell's kitchen in Erie, Pennsylvania, is an even split of both. Divided down the middle ...

Every once in a while, a genetic anomaly will occur in the animal world that blows scientists’ minds. Take, for example, the exotic bird in the image above. It’s “gynandromorphic,” which means a ...

Thanks to the developmental fusion of male-female bird twins into one individual, this northern cardinal is half red and half tan -- split lengthwise down its middle -- and is half male and half ...

When North American ornithologists hear a bird singing, they're likely to assume it's a male. But in many species, the females sing too -- researchers argue that a better understanding of these ...

Kevin Omland is a professor of Biological Sciences at the University of Maryland, Baltimore County. Evangeline Rose is a postdoctoral research associate at the University of Maryland. Karan Odom is a ...